My fiance and I have been together for a little more than 3 and a half years and we are always very careful and protected when having sex and we don't have any incidents that we can think of that would make pregnancy possible but I was supposed to start my period on Saturday and I still haven't. I took a pregnancy test on Monday night and it was negative and I'm going to retest tonight or tomorrow morning but is it possible that I'm just not going to have the period and that I'm still not pregnant? I'm usually very regular(only maybe one day late/early) but I've never just missed a period like this. I have been having a lot of clear vaginal discharge since I should've started a few days ago and my breasts have been so sensitive the last week to the point where it was painful, but they usually are during my usual PMS, and I have IBS so I'm almost always having stomach problems, including nausea and vomiting, and I started to take a fiber supplement on Sunday which has caused me to bloat, have lots of gas and can cause nausea which I've been feeling all day. I havent had any bleeding at all since my last period ended last month(not even spotting) and my fiance says missing this period is probably from stress which has made me a few days late before but everybody at work is pressuring me about having a baby and being pregnant and that is the last thing we need right now, which is why we are so careful, so I would really like to know asap if I'm just losing my mind and I need to relax or if I should be concerned and scheduling a doctor's appointment